Dust-proof joint.



D. E. HUNTER.

DUST PROOF JOINT.

APPLICATION 11.21) snmv, 1909.

Patented Aug. 30, 1910.

lulammmunn w l:

QFFICE- DAVID E. HUNTER, 0F cameraman;masseonusncrrshssxenon TO LIBRARY BUREAU,-

' 'OF BOSTON, MASSACHUSETTS, A CORPORATION OF NEW JERSEY,

DUST-Bacon Jomi.

Application filed September 7, 1909. Serial No. 516,533.

To allwhom it concemf vBe-it known that I, Dim E. l-lUl IT ER, a

citizenv of the United States, and resident of- Qambridge, in-the county of .Middlese'x and- State of Massachusetts, have. invented new "and useful Improvements in Dust-Proofing 'ts, 'of which'the following is a specifica- This invention relates to a dust-proofing (joint, nd in the embodiment herein shown and .described'the invention is applied to a. joint between adjacent'panels particularly design'ed. foramuseum Cabinet or case.

't-ion,' -'F.igure 1 is a' horizontal sectional Z'In' the accompanying drawings which illustrate one embodiment of my invenview oftwo panel members adapted to form w'ith -eachothera miter or bevel joint con-o tainin my improved dust-proofing device; "and'Fi 2 is asimilar view of said members assemb ed. a

'The panel. members A i are provided. each with a channeled margin piece B, the edge 7 of gthe'pan'el member secured in the channel 25- of Lthe margin piece, .The outer abutting face. of each Ymargin iece is-beveled as shown at b,'-so that when two such bevel faces are placed together in the position shown in- Fig. 2, a miter or bevel joint bf is; formed. ,In the j oint-making face of each niember is a recess 6 which provides a lodgment' for thepack-ing strips, The two opposed margin pieces are preferably identical {crosssection as shown.

Secured in each recess 'b'- is'a packing strip consisting of a strip of compressible ldustI-p'roofing material,' such as felt, each strip provided with a normally salient portion which extends beyond the planes'of the. "joint-making faces 6, as shown at c.- Each acking strip also lies clear of the edges of its respective-recess, thus leaving a space or Clearance 1)? between the strips and the jointmaking fflC6S ,'SO that no part of the packing strip or-the fibers thereof will be forced into the joint I) when the two members are as- 'sembled, nor interfere with the perfect engagement of the joint making faces, as

might result if the" packing strips extended 25:0 to the edges of the recesses, or if a single packing strip were used large enough to serve as an effective dust-proofing.

scribed are juxtaposed as shown in'Fig. 2 the salient portions 0 'of' the two packing strips will make contact and be compressed forming between them ajdust-proof joint.

Specification 0f Letters Patent. Patented Aug. 30, 191i).

'vVhen the two joint members above' 'de The compressive contact between the strips will cause them to spread out laterally to some extent, but by reason of'the clearance respective recesses no part of the material of the strips will be forced into the joint I). i

clear of the meeting edges between the surface of the recess and the surface of the joint-making face, said strips adapted, when compressed, to permit said meeting surfaces of the two members. to engage eachother in a close fitting joint. 1

2. In a dust-proofing joint, two members adapted to form with each'other a miter or bevel joint provided \with mutually adapted meeting surfaces, each mernber having in its joint-making facea longitudinal recess,

a'nda strip of compressible material lodged-= 111 each recess, each strip when uncompressed having a normally, salient portion. protruding beyond the joint-making face and lying clear of the meeting edges between the surface of the recess and the surface of the joint-makmgface, said strips adapted, when compressed, to permit said'meeting surfaces of the twog members to engage each other ina close fitting j'oint.

Signedbyfime' at Boston, Massachusetts,

this 31st day of August l909.

, DAVID E, HUNTER. "Witnesses: Y

' ROBERT CUSH N,

JOSEPHINE RYAN;

so 5 between the strips and the edges of their" 

